Series 21
Epoxoline
Generic Type
Phenalkamine Epoxy
Common Usage
High solids, immersion-grade coating offering exceptional build per coat for long-term corrosion resistance. For use on the interior and exterior of steel or concrete tanks, reservoirs, pipes, valves, pumps, and equipment, as well as other steel and concrete substrates. Specially formulated to meet the latest requirements for use in potable water applications.
Special Qualifications
Certified by NSF International in accordance with NSF/ANSI/CAN Std. 61 and the extraction requirements of NSF/ANSI/CAN 600. Series 21 is qualified for interior use on tanks and reservoirs, pipes, fittings, valves, and pumps. Reference Tnemec’s certified product listing at www.nsf.org for additional details.
Series 21 conforms to AWWA C 210.
Conforms to AWWA D102 Inside Systems No. 1, 2, 5, and 6.
A two-coat and three-coat system of Series 21 meets the requirements of AWWA C550 Protective Interior Coatings for Valves and Hydrants. Contact your Tnemec representative for more information.
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Number of Components
Two: Part A (epoxy) and Part B (amine)
Volatile Organic Compounds
Unthinned: 1.20 lbs/gallon (144 grams/litre)
Thinned 10% (No. 88 Thinner): 1.69 lbs/gallon (203 grams/litre) †
Recommended DFT
4.0 to 20.0 mils (100 to 510 microns). Note: Thickness requirements will vary with the substrate, application method, and exposure. Contact your Tnemec representative.
Curing Time
| Temperature | To Handle | To Topcoat | Potable Water Immersion |
|---|---|---|---|
| 90°F (32°C) | 2 hours | 4 hours | 7 days |
| 75°F (24°C) | 3 hours | 5 hours | 7 days |
| 65°F (18°C) | 5 hours | 9 hours | 8 days |
| 55°F (13°C) | 12 hours | 18 hours | 10 days |
| 45°F (7°C) | 20 hours | 24 hours | 12 days |
| 40°F (4°C) | 22 hours | 28 hours | 16 days |
| 35°F (2°C) | 64 hours | 72 hours | 18 days |
Curing time varies with surface temperature, air movement, humidity, and film thickness. Note: Series 21 will continue to cure below 32°F (0°C), but at a slower speed. Please contact Tnemec Technical Services to discuss project-specific details. Note: Maximum recoat time with itself is 30 days.
HAPS
Unthinned: 1.14 lbs/gal solids
Thinned 10% (No. 88 Thinner): 1.79 lbs/gal solids
Primers
Steel: Self-priming, Series 1, L69, L69F, N69, N69F, 91-H²O, 94-H²O, 98-H_2_O, L140, L140F, N140, N140F, 394
Concrete: Self-priming, Series L69, L69F, N69, N69F, L140, L140F, N140, N140F, 215, 218
CMU: Self-priming or Series 215
Note: The following maximum recoat times apply; itself, 30 days; Series L69, N69, nine months; Series 1, L140, N140, 12 months.
Volume Solids
82% ± 2.0% (mixed) †
Theoretical Coverage
1,315 mil sq ft/gal (31.5 m²/L at 25 microns). See APPLICATION for coverage rates. †
Topcoats
Series 21, 22, FC22, 72, 73, 406, 1028, 1029, 1094, 1095, 1096. Note: A 14-day maximum recoat time applies when topcoating with Series 22, FC22. A 30-day maximum recoat time applies when topcoating with itself and Series 72, 73, 406, 1028, 1029. A nine-month maximum recoat time applies when topcoating with Series 1094, 1096. A 12-month maximum recoat time applies when topcoating with Series 1095.
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